Kubernetes Project Example

This project includes two microservices: echo-service and gateway-service, which demonstrate a simple backend and a gateway pattern within a Kubernetes environment.

Important Kubernetes Commands

• Get specific resources in all namespaces:

  kubectl get deployments,services,configmaps,secrets,ingresses

• Get all resources in a specific namespace:

  kubectl get all --namespace echo-namespace

• Apply a configuration to a resource by filename:

  kubectl apply -f <filename>

• Delete a resource by filename:

  kubectl delete -f <filename>

• Restart a deployment:

  kubectl rollout restart deployment <deployment-name>

Key Kubernetes Resources

• Deployments (deployment.yaml): Manages the deployment of stateless applications. It keeps a set number of replicas of pods running and updates them in a controlled way.

• Services (service.yaml): Provides a stable interface to pods, balancing traffic and enabling service discovery within the cluster.

• ConfigMaps (configmap.yaml): Manages configuration data and variables for pods, allowing you to separate configuration from the application code.

• Secrets (secret.yaml): Securely stores sensitive data, such as passwords or API keys, that you want to keep confidential.

• Ingresses (not yet defined in this project): Manages external access to the services within the cluster, typically HTTP.

Project Structure

• /services: Contains source code for the individual microservices.
• /deployments: Contains all Kubernetes deployment YAML files.
• /scripts: Contains utility scripts such as build.sh for building Docker images and deploy.sh for deploying services.

For detailed explanations and more commands, refer to the Kubernetes documentation.